Beneby replaces Mark Schiavoni, who is departing Exelon for Arizona Public Service where he will lead APS’ fossil energy business. Beneby will report to Crane.

Crane said, "Mark has been the top leader for Exelon Power since 2004, overseeing improved fleet commercial availability in multiple merchant markets. We wish him well with the next chapter of his career. I know Doyle will capitalize on this success to help Exelon Power meet its vision of being the most competitive and reliable power generator in the U.S."

Beneby was most recently Vice President, Operations for Exelon Power. He will be responsible for the operations of about 8,000 MW of natural gas, coal and hydroelectric generation in five states.

These changes are effective March 27.

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Exelon Corporation is one of the nation’s largest electric utilities with approximately $19 billion in annual revenues. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 485,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.